Hello, this question has been giving me a lot of trouble for quite some time.
I will just outline the details of the question here:
You have a 10 L sample of an unknown gas at STP which undergoes combustion in the presence of excess oxygen. The products were then isolated and cooled at STP. The products were Carbon Dioxide (20 L of gas) and Water (16 g of liquid). What is the molecular formula?
Now from my research, there are many similar examples like this, but they provide the mass of the unknown sample, whereas here, you have the volume. I'm thinking of trying to convert this volume to mass, and then dividing it by the moles you get from n = PV / RT to get molar mass. And then from there, somehow using it to get to the molecular formula.
Can someone please guide me in the right direction on this.